I had looked at that in my search for ideas, I do like the design.
I chose to go a different direction for now for a couple reasons.
One, I wasn't sure meek little quail would stick their heads in a scary dark hole a inch deep to get the food, they seem to be more skittish about such things than chickens, but that's just my observation. Even the fairly open ports on my PVC feeder they took a couple days to adjust to and won't reach that far in when the food gets low.
Two, I wanted something light enough for stacking rabbit cages and the only scrap materials I had available to work with were PVC and round five gallon buckets. Both are round which wouldn't work with the flat backed PVC flanges they used in the videos and buckets and something to stack them on to put them at head height and keep them clean would be too big and heavy for the rabbit cages. I was trying to stick with as much scrap out of my bosses shop as possible so I went with a PVC feeder that I could hang with fence wire I had around already.
Once I am rigging things for outdoor cages I may see if I can buy a 2 gallon-ish square container to put ports like that in. If they don't take to reaching that far in I could always notch out the lower portion of the flange.
Here is a link to a spill baffle by one of the same people. I'll definitely look through their stuff, it looks like the two of them put some great ideas to use.
Cheers,
Jessie
Cheers,
Jessie
My quail put there head into the feeders I make from freezer containers.